Recommend a video/audio converter.

[Cornova]

I use Audacity to convert mp3's into the ogg format, but sometimes I need to extract the audio from .flv or .mp4. I used to use a program called pytube to extract audio (into mp3, then audcity to ogg) but apparently it has been abandoned. OggConvert doesn't convert to audio, but simply makes it into an ogv, often ruining the video quality. Can anyone recommend an application to do this?

[woodsmoke]

Hi
If one cannot get it converted "directly" then possibly use several apps as in the discussion in this thread;

http://www.kubuntuforums.net/showthr...ile-conversion

I also keep around:

SoundKonverter
Sound Converter
WinFF

in addition to Audacity and ffmpeg, and one needs all of the codecs in "restricted", which you should probably already have if you answered the question in the installer.

woodsmoke

[Cornova]

Both SoundKonverter and WinFF work great, thank you.

Oddly, converting an mp4 to ogg the file size was 50mb. Loading it into Audacity and exporting it in the same ogg format reduced it by 3mb. Converting the original mp4 to ogg using WinFF resulted in a 33mb file, Audacity converted it to 45mb. None of them calculate the duration time correctly although the entire duration is there.

[SteveRiley]

This should work...

Step 1: probe the file to find the audio bitrate

avprobe [i]inputFile[/i].mp4

Look for the audio stream info. Example:

steve@x1:~/local/Videos$ [B]avprobe test.mp4[/B]
avprobe version 0.8.3-6:0.8.3-6ubuntu1, Copyright (c) 2007-2012 the Libav developers
  built on Aug 11 2012 19:25:13 with gcc 4.7.1
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2012-01-16 11:39:16
  Duration: 00:03:20.70, start: 0.000000, bitrate: 694 kb/s
    Stream #0.0(und): Video: h264 (Constrained Baseline), yuv420p, 640x360, 596 kb/s, 29.97 fps, 29.97 tbr, 60k tbn, 59.94 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
    [B]Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 96 kb/s[/B]
    Metadata:
      creation_time   : 2012-01-16 11:39:16

Step 2: extract the audio, convert to Vorbis, set bit rate, and save in OGG file:

avconv -i [i]inputFile[/i].mp4 -acodec libvorbis -b [i]bitRate[/i]k -vn -sn [i]outputFile[/i].ogg

Example:

avconv -i test.mp4 -acodec libvorbis -b 96k -vn -sn test.ogg

--

I could not find a way to automatically determine the bit rate and feed it to avconv all in one command.

[vinnywright]

I use Audacity to convert mp3's into the ogg format, but sometimes I need to extract the audio from .flv or .mp4. I used to use a program called pytube to extract audio (into mp3, then audcity to ogg) but apparently it has been abandoned. OggConvert doesn't convert to audio, but simply makes it into an ogv, often ruining the video quality. Can anyone recommend an application to do this?

I am confused Audacity dose a wonderful job of exporting .flv or .mp4 to .ogg or anything else (mp3,m4a-acc,wav,aiff,gsm,flac,mp2,ac3,amr,wma) ,,,,,,,do you have ffmpeg installed?

I use it all the time for just this ,,,,,extracting audio from video that is ?

VINNY

[Cornova]

I am confused Audacity dose a wonderful job of exporting .flv or .mp4 to .ogg or anything else (mp3,m4a-acc,wav,aiff,gsm,flac,mp2,ac3,amr,wma) ,,,,,,,do you have ffmpeg installed?

I use it all the time for just this ,,,,,extracting audio from video that is ?

VINNY

Wow, your right you can do this with Audacity. On Ubuntu 10.04 it would always crash anytime I tried to open anything with video in it. I hadn't tried it on Kubuntu because I assumed it could only read audio.

It still doesn't show the duration correctly though, maybe that's a problem with the player (VLC)

Edit: It is VLC, Amarok gauges the duration properly.

[vinnywright]

cool ...glad it's working for you now

VINNY

[Cornova]

cool ...glad it's working for you now

VINNY

Thanks.

What do you guys use for video editing? Like lets say you want to load an mpeg into something like Audacity and export it to ogv. I had an application on 10.04 that would do this but I remember it would change screen so it wasn't full inside the window. OggConvert ruined the video half the time.

Someone create "Vidacity" lol

[vinnywright]

Thanks.

What do you guys use for video editing? Like lets say you want to load an mpeg into something like Audacity and export it to ogv. I had an application on 10.04 that would do this but I remember it would change screen so it wasn't full inside the window. OggConvert ruined the video half the time.

Someone create "Vidacity" lol

try

ffmpeg -i file.mpeg file.ogg

this will do a simple convert with sane default options and give a .ogg video from the .mpeg you could start with a .mp4 or .flv or or ....and end with .ogg or .mp4 or or whatever you have codecs for

VINNY

[SteveRiley]

try

ffmpeg -i file.mpeg file.ogg

this will do a simple convert with sane default options and give a .ogg video from the .mpeg you could start with a .mp4 or .flv or or ....and end with .ogg or .mp4 or or whatever you have codecs for

You have to be careful with that when you want to extract a particular stream, though.

If your input file is a container holding both a video and an audio stream, and your output file is also a container that's capable of holding both streams, then the simpler command like that will result in a file with both streams. Your "file.ogg" will contain a Theora video stream in addition to an audio stream.

To extract just the audio portion, you'll need to use the version of the command I provided earlier. The -vn flag means no video; the -sn flag means no subtitles.

Furthermore, it's important to understand which kinds of audio and/or video are supported by which kinds of containers. For instance, an OGG container can hold not only Vorbis audio, but also FLAC audio. So this command:

avconv -i file.mp4 -vn -sn file.ogg

could create an OGG file containing a FLAC audio stream. To obtain a compressed Vorbis output, it's necessary to indicate which codec to use:

avconv -i file.mp4 -acodec libvorbis -vn -sn file.ogg

Now, in the case where you're converting to a container format that can't support one or another stream type, LibAV will simply discard the unsupported portion. MP3 files have no facility for containing video, so the command

avconv -i file.mp4 file.mp3

will result in an MP3 file containing only the audio portion of the original file.

To learn the names of the supported codecs, run this:

avconv -codecs

[vinnywright]

You have to be careful with that when you want to extract a particular stream, though.

If your input file is a container holding both a video and an audio stream, and your output file is also a container that's capable of holding both streams, then the simpler command like that will result in a file with both streams. Your "file.ogg" will contain a Theora video stream in addition to an audio stream.

To extract just the audio portion, you'll need to use the version of the command I provided earlier. The -vn flag means no video; the -sn flag means no subtitles.

Furthermore, it's important to understand which kinds of audio and/or video are supported by which kinds of containers. For instance, an OGG container can hold not only Vorbis audio, but also FLAC audio. So this command:

avconv -i file.mp4 -vn -sn file.ogg

could create an OGG file containing a FLAC audio stream. To obtain a compressed Vorbis output, it's necessary to indicate which codec to use:

avconv -i file.mp4 -acodec libvorbis -vn -sn file.ogg

Now, in the case where you're converting to a container format that can't support one or another stream type, LibAV will simply discard the unsupported portion. MP3 files have no facility for containing video, so the command

avconv -i file.mp4 file.mp3

will result in an MP3 file containing only the audio portion of the original file.

To learn the names of the supported codecs, run this:

avconv -codecs

O so vary true Mr Riley ,,,, and their are a plethora of options that would take pages of text to describe which is why I sead ...." a simple convert" .....LOL have a look at "man avconv" or "man ffmpeg" to see for your self @Cornova but Mr Riley's examples are good,, and sound advice as always

VINNY

[SteveRiley]

pages of text to describe

Pages indeed! Start here: http://libav.org/avconv.html

[Cornova]

Thanks for all the commands. I'm going to copy them in a document in case I never want to use them.